Warm air furnace



4 Sheets-Sheet T. RUSSELL WARM AIR FURNACE Filed Jan. 9, 1930 Jan. .12, 1932.

igf fi i" INVENTOR 71 7110 Emma/Z BY F ATTORNEYS TZ/J- Jan. 12, 1 932. RUSSELL 1,841,210

WARM AIR FURNACE Fil ed Jan. '9, 1930 4 Sheets-Sheet 2 4 o o o x l a1 51 t 2 M o c 0 Q 36 i Q 5 I- 4 o 35 {H 6/ o 4/ 3 o 6 o l 1 s1 7/ 63 INVENTOR A M/T @M/ A TTORNEY Jan. 12, 1932.

T. RUSSELL WARM AIR FURNACE Filqd Jan, 9, 1930 4 Sheets-Sheet 3 ATTORNEYs INVENTOR 771240 FUJJ'Z/Z BY Jan. 12, 1932. T. RUSSELL WARM AIR FURNACE Filed Jan. 9, 1930 4 Sheets-Sheet 4 v INVENTOR 721w iBuaqe/l P6 1 ATTORNEYS Patented Jan. 12, 1932 "U IT STATES 1 trITnsaUssELn-or ALBION, MICHIGAN s i warm Am FURNACE,

Application filedia iuary 9, 1930 seriai'nmaia'sos,

Second, to provide such a furnace with the pot and combustion chamber with direct smoke pipe connection. f

10, Third, to providesuch a structure in which the firepot ismade up of vertical stave-like sections with special joint and retaining means to hold them in place. g

Fourth, to provide in such a furnace an improved combustion chamber with' stavelike sections with special means for retaining them in place.

Fifth, to provide a furnace so constructed with vertical radiating fins on the firepot and 20 combustion chamber. Sixth, to provide in such a structure an improved adjustable joint means whereby the same staves can be made use of for the manufacture of firepots of different diameters and capacities.

Seventh, to provide such a structure with an improved spring retaining band or hoop.

Eighth, to provide an improved top or smoke collar structure for a sectional combustion chamber dome with improved packing joint therefor.

Ninth, to provide such a structure with i an improvedfuel feed neck. 7 j v Tenth, to provide such a structure with firep'ot a'ndthe combustion chamber.

Objects relating to details and economies of my invention will appear from the description to follow. 7 The invention is defined and pointed out in the claims.

Preferred embodiments of invention are illustrated in the accompanyingdraw ings, in which; 7 V r Fig. 1 is a detail vertical central sectional elevation through the furnace firepot' andcombustion chamber and surrounding casing taken on line 11 of Figs 2 and 3, the top of the casingand the lower part of the easing andashpit being'broken away. on V taken on line 2-2 of her.

improved water heater sections for both the the combustion chamber above.

' Fig. 2 is a detail transverse sectionalplan view through the midip'ortionof the firep ot *igs. 1 and 10. Fig. 3 1 is a detail-sectional plan view through the combustionfcliamber of the fur nace, taken on section line 3+3 of Fig. 1.

Fig. 4' is an enlarged detail horizontal sectional viewion line4-4 of Figs. 1 andYlO through-a plurality of the firepot sections, showing the formof the joint. therebetween and the relation of the radiating fins. 60 Fig. 5 is a detail perspective viewof one. of the stave-like sections of the firepot.

' Fig. 6 is a perspective viewof one'of the stave-like sections of the combustion chain Fig. '7 is adetailed verticalsectionthrough one ofthehollow firepot staves on-line 7+7 1 of Fig. 2 showing the water connections.

Fig.8 is a detailed vertical section through one of the hollow combustion'chamber staves on line 88 of Fig. 3 showing the water connections. 7 if Fig. 9- is an enlarged detail longitudinal' section through one of the tie band yokes tak en on line 9-9 of Fig. 1.

Fig. 10 is a detailvertical sectional view comparable to Fig.1 showing a modification of the structure in "which the firepot alone is made of sections, the combustionchamber and other'parts of thefurnace'being of usual a l is the ashpit or base casting of the furnace which may be provided with any usual grate such asthe bar grate '2.

Supported on the base is the firepot 3 which is'madeup of stave like sections 31. "The lowerends of-these staves are shouldered at 99 32 to form ajoi'nt with the groove in thebase j casting 1. The upper endsjof the 'staves 'are 5 likewise'shouldered 3.1134 to form a joint'with Vertically'on each side of the 'firepot'sectionis formed a jointgroove 35 and disposed in the said vertical groove is a round rod" 8 V which is embedded in asbestos cement and makes a flexible a'ndtight joint'betw'eenthe: parts, yielding sufficiently to take-care of the PATENT 1 orFicE g g expansion and enables the said stave-like sections to be used without any special fitting for firepots of difterent diameters within the usual limits of such structures.

Each section is provided with a plurality, here shown as three, vertical series of parallel heat radiating fins 33, these being in staggered relation so that the center fin is centrally disposed of the stave and is unobstructed on both sides, this fin being formed to receive the saddle for the clamping means which retains the staves together. V

Around the firepot sections is disposed the retaining band 4. Between the band and each section is disposed a saddle'fi which is 7 made up of an open ended box-like section on the bottom of which are formed. a pair of vertical ribs 51, 52 which straddle the said center fin of the stave-like section 31. An anti-friction roller 53 is disposed at each end of, the saddle.

One of these saddles is provided for each segment of the firepot. They are clamped and retained'together by the tie rod or band or hoop. The hoop 4: is made adjustable bythe double lever means 6, 6 which are fulcrumed together at their inner ends at 61.

The meeting ends ofthe band 1 are upturned at 41 and secured to theleversby suitable bolts 42. The outer ends of the levers 6 are provided with a radiating bolt 62 having a.

spring 63 and an adjusting nutG-i for drawing the said levers together under strong spring pressure.

7 is the outer casing of the furnace which is suitably slotted at .71 to accommodate the adjusting lever 6. The bolt 62 andspring 63 are disposed'outside of the casing so that 3 they will not be exposed to injury by the heat. 7

Towards the bottom and inside of each staveI v cast inwardly proj ecting upwardly.-

tap'ering ribs 36which when disposed as seen inFig. 1 form air passages around the base of the firepot for the ready intakeof airto maintain the combustion. All of these are so formed that they are instraight lines at right angles to the body part of the stave so that the series of fins and ribs and all parts can be very readily cast from patternswithoutuse of cores.

When desired, one or more sections of the firepot can be enlarged and made hollow (see 7A,' Figs. 2 and 7) fittings and connections being provided for the top and bottom thereof to circulate water therethrough for heat ing a range boiler or a radiator as desired.

In my preferred construction I make'the combustion chamber of similar staves to those of the firepot.

When these firepot sections are. assembled together, the shoulders 34; at the top form a groove for the oint to the combustionchamber above and on this groove I dispose and arrange a sectional combustion chamber also on and through the same, as seen also in Fig.

1, where the same appears in section with thefeed door 12 at the front.

One or more, staves of the combustion chamber may be hollow and be provided with water connections to a radiator or heating system as seen at 9A in Figs- 3 and 8.

The clamping band is divided and secured by suitable lugs 111 to theoposite sides of the feed neck (see Fig. 3) This band is retained by adouble lever structure precisely the same as the connection for the firepot be-' low.:. A second band is preferably disposed aroundthecombustion chamber engaging fins 91 towards the top, as seen particularly in Fig. 1, which is shown partially in Fig. 3 and partially broken away to show the lower band-as welh I I V The roinbustionchamber staves are provided with inwardly projecting vertical fins 92 within the top which project into the path of the'products of combustion when they are emerging from the said combustion chamber.

A smoke collar 13 otcast metal is provided with a pipe flange 131 at the top and double anular flanges 132, 133 around the bottom. These flanges 132, 133 are separated to form grooves 134 which receives the inwardly projecting upper ends of the staves 9 and thepacking cement and the clamping rod or band 135. p This rodis. clamped in place by screw thread of any suitable means and wedges under the upper flange 133 thereby forcing the lower flange 132 firmly up against the inner ends of, the combustion chamber segments 9, clamping the cement and forming a tight joint both above and below the same.

The smoke pipe 14 shownin'fragment leads I out through the side of the casing 7 in any direction In Fig. 8 a modified form is shown in which acombustion chamber 15 of usual construction is provided and fitted onto the top of the firepot.

With my improved construction it will be readily understood that great economies are accomplished in the matter of manufacture. A single pattern -lor a firepot stave serves to make any size firepot within the range of rcquirements. A, single pattern for a combustion chamber stave is sutlicient for each size of combustion chamber. The oints between .pa-i s togetherby the bands.

chamber as the rods can bent toforrn and;

fit into the groove joints betweenthe stares of the combustion chamber. v

ille saddles for each section proi 'ide ananti'l riction means for the clamping band but the expansion being even in all directions it is possible to produce the structure w thout the presence ot the saddle although the. sad- ;rlles are of very great advantage.

lVith my improved furnace, if a stave or.

. segment burns out, it can be readily replaced 'without replacing the whole firepot or combustion chamber. By forming the structure n segments in this Way, large fins are readily formed on each section because it is a mat-.' ter of straight casting that can, be made very smooth from patterns and present a" large radiating surface for absorbing the heat from the fi-repot and combustion chamber. Thisbeing so, it is not necessary to provide a radiator to insure the heat transfer as that is accomplished by the fins This results in saving of the very large castings usual for radiators and it permits of a compactfurnace casing, delivering the heated air very promptly to the rooms to be heated. The castings, because of this free circulation, remain clean and do not accumulate dustand soot and consequently remain in efiicient condition for the transfer and delivery of the heat.

As pointed out, the firepot is available in any style of furnace Also the combustion, chamber can be superimposed on the regular design of firepot but these structures go espe cially well together and they lendthemselves to a matter of combination'hot airand hot water furnace.

Ihave shown my improvements in the form especially preferred by me. I desire to claim it in that specific form and also desire to claim it broadly as pointed out in the appended claims.

Having thus described my invention, What claim as new and desire to secure by Let- I ters Patent, is:

l. A furnace firepot made up of upright stave-like sections with joint shoulders at top and bottom, joint grooves on the sides'of each of said staves, packing cement and roundrods disposed in said joints, inwardly projecting vertical flanges at each side of the bottom of each stave to form air passages around the firepot, outwardly projecting vertical parallel heat radiating finson each stave including a center fin which is unobstructed at each side, a combustion chamber made up of stavedike sections superimposed on the said firepot sections, each stave curved inwardly at the top and being provided with joint grooves at each side and provided:with a curved i rod and asbestos packingcement in the joints, 1

and each having outwardly projecting radi-j ating bus on its outer. surface ncluding a center fin and an inwardly projecting radiating finatthe top, a smoke collar therefor-f witlrpipe flange at the top-and laterally projecting-spaced flanges at the bottonnforming an angular joint groove embracing the up per ends of saidlcombustion chamber staves, packing cement in said joint and a retaining "icompression ring in the said annular space-g above the ends of saidstaves, aclamping band 7 around Tthesaid staves for both the firepot and combustionchamber, saddles for each stave sec-tionFoomprising longitudinal box-. like members with lugs for engaging the center fin of each stave section and with rollers towards each endonthe outside-for engagement by the-clamping band for the said fire pot and combustion chamber, apair of levers I pivoted and fulcru med together at .theirinner ends connected to each of said clamping bands intermediate their ends; and aspiring 1 bolt for clamping the outer ends of saidlevers;

2. {A furnace firepot inadeilup of upright stave-like-- sections with joint shoulders at top and bottom. andWit-h joint grooves at each, sideQoutwardly projecting vertical par allel heat radiating this on each stave including a center'linwhich is unobstructed at each side, inwardly projecting verticalflanges toward each side ofthe bottom ofeach stave tov form inlet air passages around the .firepot; pack ng cement and round rods disposedln said joints between said staves, a clamping band aroundthe saidstaves, a saddlefor each stave section; comprising a longltudinal boxlike member with a lug for engaging the centerhlinwot each stave section and with rollers towards each end. onthe outs de forengagemfe'ntb'ythe clamping band, a pair of levers pivotedand fulcrumed together .at their inner 1 endsand connected intermediate their ends to the ends of saidclamping 'band, and'a springholt for:clampingjthe' outer ends of,

said levers together.

3-. A, furnace firepot 'inadeiip of stave-likesections with j oint shoulders at top fill-(lbOtbOlli and with joint grooves each side, outwardly;pro ecting vert cal parallel l heat radiating fins on each stave including a center fin which is nnobstructedlat each side, inwardly proj ecting vertical flanges toward cachside ofthe bottom of each stave to-form inlet airpassages around the firepot, packing between the groovesof said stave sya clamping band around thefsaid staves, a saddle for. each stave-section compr sing longitudinal boirlikememberiwith.aqlug or engaging the I center finof each stave section and with rollers towards each end on the outside for en-- gageinent by the clamping band,,a pair of levers pivoted and fulcrumed together at their parallel heat radiating fins on each stave ineluding a center fin which is unobstructed at each side, inwardly projecting vertical Y 'flanges toward each side of thebottom of each stave to form inlet air passages around thefirepot, packing between the grooves of staves, a pair of levers pivoted and fulcrumed together at their inner ends connected intermediate their ends to the ends of 'saidstaves, a clamping band around thesaid gether, a castsmoke collar at the top of said combustion chamber with a smoke pipe flange'at the top, lateral flanges at the bottom of said collar forming an annular recess embracing the upper ends of said staves, packing cement disposed within the recess, and a clamping ring forced into the recess between said flanges and above the ends of the staves to force the smoke collar upward and compress the packing.

In witness whereof I have hereuntoset my hand. 7

TITUS RUSSELL.

said"clampingband, and a spring bolt for i cl ampin g the gether,

outer ends of said levers to- 5. A furnace firepot made up of'upright stave-like sections with oint shoulders at top and bottom. and with joint grooves at each 5 side, outwardly projecting vertical parallel 7 heat radiatingfins onv each stave including y 'acenter fin .Which'xi's unobstructed at each side, packing between the groovesflof said .staves, a clamping band around the said staves, a saddle for each stave section comprising a longitudinal box-like member with a lug for engaging the center fin of each I stave section and with rollers towards each end on the outside for engagement by the 3 "clamping band, a pair of levers pivoted and fulcruined together at their inner ends connected intermediate their endsto the ends of said clamping band, and a spring bolt for clamping the outer ends of saidflevers to- 'gether, 7 I

6. A furnace firepot made up of upright stave-like sections with joint shoulders at top and bottom and with joint grooves at heach side, outwardly projecting vertical '5"parallel heat radiating fins on each stave including a center fin which is unobstructed at each side, packing between the grooves of said staves, a clamping band around the said I staves, a pair of levers pivoted and ful- 0 crumed together at their inner ends connected intermediate their ends to the ends of said clamping band, and a spring bolt forclamping the outer ends of said levers together. 7 A furnace firepot made up of upright stave-like sections with joint shoulders at top and bottom and with joint grooves at each side, outwardly projecting vertical parallel heat radiating fins on each stave including a center fin which isnnobstructed at each side,

5o packing cement and round rods disposed in' f I said joints between said staves, and a yielding clamping band around the said staves.

8. A a furnace comprising a combustion chamber made up of separate stave-like seg- 65 ments with inturned upper ends clamped to- 

